Hub for locks and latches.



No. 784,824. r PATENTED JULY 28, 1903. N. W. GRANDALL.

HUB FOR LOCKS AND LATOHES.

APPLICATION 1 11,31) MAY 2, 1903.

' no MODEL.

.50 side. Each of these hub extensions is per- UNrT n STATES 1 Patented Ju1y 28, 1on3.

PATENT Curios.

NATHAN W. CRANDALL, OF MERIDEN, CONNECTICUT, ASSIGNOR TO BUS SELL & ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CON- NECTICUT, A CORPORATION OF CONNECTICUT.

HUB FOR Looks AND LATCHES.

SPECIFICATION forming part of Letters Patent No. 734,82Q, dated July 28, 1903.

' Application filed May 2. 1903. Serial no. 155,294. (No model.)

To all whom it may concern:

Be itknown that. I, NATHAN W. CRANDALL,

a citizen of the United States, residing at Meriden, in the county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Hubs for Locks and Latches, of which the following is a full, clear, and exact description.

My invention relates to improvements in looks and latches, and particularly to a hub therefor. v,

The hub of a doorlock or latch is that member actuated bya manually-operated spindle,

and said hub usually is provided with a pro jection or roll-back coacting with a part of p p the internal mechanism of the lock for operating the latch or bolt.

The object of my invention is to simplify and cheapen the construction of the hub. These results I attain by the construction set forth in the following description and illustrated in the accompanying drawings, in. which' Figure l is a view of a blank from which the hub is formed. Fig. 2 is a perspective view of the finished hub Fig. 3 is an elevation of a lock of one form, showing the hub in its usual position. Fig. 4 is an end elevation of a modification. Fig. 5is ahorizontalsection thereof. W

1 is a lock-case in which a hub 2 is revolubly mounted, said hub having a spindle-passage 4, usually of angular form. The hub has roll-back extensions 5 5, which engage 5 with a latch-slide 6, controlling the latch 7. r A spring 8, mounted in anysuitable way in lock-case, serves to move the latch into its normally operative position. The hub portion 2 constitutes the bearing for the usual spindle. Heretofore roll back hubs have usually been formed of cast metal. By my invention I utilize sheet metal and produce a finished structure of less weight and of greater strength without sacrifice of wearing qualities. The roll-back hub is formed from a blank of metal shaped, for example, substantially as shown in Fig. 1, in which the roll-backportion is theintermediate portion, with the lateral hub extensions 2 '2 on each forated to receive the spindle. The hub extensions 2 2 are preferably oifset or corru: gated to form trunnions 10, as best seen in the perspective View Fig. 2 and in Figs. 4 and 5. These corrugated annular extensions when present constitute the hub ends proper, which may take a bearing in the frame or case 1, in which the hub rotates. The blank is finally bent into the form shown in Fig. 2, forming a channel or corrugation in the rollback portion 5, the same being arranged tangentially to the hub extensions 2 2, which channel or corrugation is not only very useful in strengthening the said rollback, but also gives, in effect, a bearing of the same 6 width as the ordinary cast-metal bearing, at the same time eflecting a substantial saving in the metal.

From the foregoing it will be seen that a hub made of comparatively thin sheet metal when completed possesses the thickness of the usual cast-metal hub at a. substantial saving in material. Since lock-cases frequently difier as to thickness and since it is desirable to have the hubs of a thickness corresponding relatively thereto, so that the annular extensions will take a bearing in the lock-case, it will be seen that it is merely necessary to widen or narrow the channel in the roll-back portion 5 in order to space apart the hub extensions 2 2 properly to fit the lock-case.

In the modification shown in Figs. 4 and 5 I have shown that a fillingpiece 9 maybe inserted between the hub-sections2 2, if desired. Even in this event a saving in metal results, because the space within the corrugated annular extensions, of the hub'extensions is left unfilled. Of course the fillingpiece might be only largeenough to occupy the channeled roll-back portion. In anyevent the construction is simple, economical, and permits the rapid production of articles of this character.

The number of roll-back extensions is of 5 course immaterial. Two are shown, since that form is most common.

What I claim isa 1. A roll-back hub for locks and latches comprising a sheet-metal blank having hub IOO extensions, said blank being doubled to form a roll-back arm arranged tangentiallyof said hub extensions.

2. A roll-back hub for locks and latches comprising a sheet-metal blank having hub extensions, said blank being doubled to form a roll-back arm arranged tangentially of said hub extensions, said hub extensions having annular-corrugations therein to form oppositely-arranged trunnions.

3. A roll-back hub for looks and latches comprising a sheet-metal blank bent to form a channel or corrugation, hub extensions at each edge of said channel or corrugation and arranged opposite to each other, a passage through each of said extensions, said passages registering substantially with each other, a part of said channeled portion forming a rollback arm arranged tangentially with the hub extensions.

4. A roll-back hub for looks and latches comprising a sheet-metal blank bent to form a channel or corrugation with hub extensions at each edge thereof and arranged opposite to each other, a passage through each of said extensions, said passages registering substantially with each other, the channeled portion being extended to form a roll-back arm having a double-faced bearing said roll-back arm being tangential to said hub extensions.

5. A roll-back hub for a lock or latch comprising a'sheet-metal blank having hub extensions said blank being doubled to form a channeled roll-back arm arranged tangentially to said hub extensions, and a fillingpiece in said channeled portion.

6. A roll-back for locks and latches comprising a sheet-metal blank bent to form a channeled or corrugated roll-back portion, hub extensions at each edge of said channeled portion, said extensions being parallel and opposite to each other and being corrugated to form annular trunnions, a passage through each of said trunnions arranged to receive a spindle, said channeled roll-back portion being arranged tangentially to the hub portion.

Signed at New Britain, Connecticut, this 28th day of April, 1903.

NATHAN W. ORANDALL.

Witnesses:

M. S. WIARD, C. E. RUSSELL. 

